CMOS
Advanced Member level 3
high input impedance amplifier 4069
Hi
I have constructed "X10 Home Automation System" (AN236) from Microchip. The system is working perfectly fine but now I am facing trouble with 4069 CMOS inverter that is used to demodulate X10 data from power line. When I switch on the mains supply and if there is arcing in the switch contacts, 4069 goes dead. This has happend for more than 10 times. MOV has been used in the circuit but I think it is of no help against these voltage spikes. The power supply used is transformerless. The schematic of 4069 section is shown below.
How do I deal with this problem?
Hi
I have constructed "X10 Home Automation System" (AN236) from Microchip. The system is working perfectly fine but now I am facing trouble with 4069 CMOS inverter that is used to demodulate X10 data from power line. When I switch on the mains supply and if there is arcing in the switch contacts, 4069 goes dead. This has happend for more than 10 times. MOV has been used in the circuit but I think it is of no help against these voltage spikes. The power supply used is transformerless. The schematic of 4069 section is shown below.
How do I deal with this problem?